Edges Documentation

Identifies edges in an image using a gradient-based, Canny detection algorithm.

Licensed under Creative Commons BY-NC-SA 3.0.

Questions or comments? Contact Joseph Schlecht.

usage: edges OPTIONS 'image'
where OPTIONS is one or more of the following:
 -h, --help              Prints program usage.
 -v, --version           Prints program version.
     --random-color      Color edges with random selected different colors.
     --color-out=ARG     Original image with edges colored.
     --map-out=ARG       Bi-level image edge map.
     --edges-in=ARG      File to read ASCII formatted edge set from.
     --edges-out=ARG     File to write ASCII formatted edge set to.
     --begin-mag-thresh=ARG  
                         Hysterisis starting gradient magnitude threshold.
     --end-mag-thresh=ARG  
                         Hysterisis stopping gradient magnitude threshold.
     --break-dp-thresh=ARG  
                         Gradient vector dot product threshold for breaking
                         edges.
     --break-dp-num-avg=ARG  
                         Number of gradient vectors to average when
                         computing the dot product threshold for breaking
                         edges.
     --sigma=ARG         Gaussian smoothing sigma.
     --sample-rate=ARG   Edge point sampling rate.
     --min-len=ARG       Minimum length of an edge.
     --seed=ARG          Random seed.